I could not agree more with Ardy about safety and comfortable equip... than owning your own!
I completely disagree on buying seconds on ebay though - for obvious reasons (and my own bad experiences)
Please read through and you will agree with me too in the end.
One does not have to buy all the equip. all at once - I certainly didn't! (and therefore I also had to rent till I got all my equip. - many brands for months on end... and I was shocked with what I was given to dive with!)
So, I recommend you to buy a piece every few months or so. (or even one expensive piece every year).
My first 'big' investment was my BC, I was so proud and (still) happy with it I still dive with it almost 8 years later. Then I bought some affordable regs. and next an affordable wet suit. 1 year later I had my complete equip. with UW camera & strobe etc.
So if you dive more than 6 times a year or so, I'll advise you to do the same. (without the UW camera if you're not hat keen, of course).
Specially because if you're not very experienced you would certainly benefit from an equip. you know and use AND it's your size, comfortably, not 2 sizes too big or small!
There's nothing more comfortable than wearing your own size clothes, the same goes for safety - There's nothing safer than your own equip. that ONLY YOU clean, service and know it inside out!
I have travelled around the world diving and always took my own equip. and I have seen more rented equip. failing than anything else! although it only caused divers to cancel their dives (what a pain if you paid thousands on a live-aboard for once in a life time dive holiday to the Great Barrier Reef or similar) or other times wait for the replacement equip. and therefore delay your dive...
- I certainly would not like to imagine the worst.
The reason I go through the LITTLE extra care and expense of checking-in my complete dive gear wherever I travel to (although lots of airlines nowadays do take your scuba gear for FREE if you present your PADI Card) it's because I like the fact I know my equip inside out, with my eyes closed!
And this along was enough to help me out of many situations where once a dive leader left me behind on a cenote/cave in Mexico (where there is no natural light coming through), later on other dive in South Africa due to very strong currents my group got all separated and I got to face a 3m long Bull/Zambezi shark, literally at an arm's length from me, another time in Australia, during my Nitrox course, I was given dodgy rental tanks labelled 'Enriched Air' when this was not the case! And the 'common' air tank was in fact the Nitrox one...!
- Oh, and another time in Egypt, I noticed a diver on my group had her regs/tank leaking quite considerably, and when I got the dive leader's attention, he told us they didn't bring any spare rentals and the diver went diving with a leaking equip anyway...!
No need to say, she run out of air pretty quickly and had to surface aborting the dive for the rest of us. - I was not happy! - The same reason when I finally saved up for a long time, for my first GBR live-aboard, I wanted to be sure I was not another diver being left behind when the 'season for lost divers' just started again in Australia.
So I got an auto inflate sausage/marker buoy and beam lights just in case.
All I'm trying to say is there's not many people I trust my life with! And although many swear diving can be a huge risk in it self (including dive insurance's who do not cover you if you're deeper that 20m) I know from good experience, diving is not more dangerous than driving my car or riding my bike (where I've been victim of hit and run). But I rather make sure I do what I can, to come back alive to shore so I can soon go back in!
And this means having my own equip. that I know inside out and I am very comfortable with, so I don't need to stress underwater with a rental equip. when something does not work properly (I have seen it too many times) and one could not be familiar with it. And also of course keep dive training up to date, OR at least dive as much I can, not just for the cheer fun and enjoyment, but to get experience too.
I personally, would not EVER trust my life on a dubious rental diving equip.
- Not after many years of seeing too many renowned professional dive centres worldwide, disregarding the cleaning, maintenance and servicing of their own rental equip. and also, selling ex-rental equip. at a profit (after making the money with rentals 10x over) and not even servicing it before selling it.
This is my experience, and I choose not to risk any more than I have to, by going in the water, into an environment that is not mine!
...but oh boy, I really love diving...
Safe diving,
RV