@Ludo19 why do you think the OP is not overly fussed? Not sure where you've got that impression from?
@Minikievs I was same as you, hadn't had a cat since growing up so wasn't sure of all the logistics of ownership. However, we got our rescue boy almost a year ago and haven't regretted it for a single minute, he's completely one of the family now.
Obvs we're at home a lot more now but up until march we were out of the house from 8.30 til 4pm most days and he was fine. Slept most of the day (well that's what he does when we're here all day anyway!), and then got loads of attention in the evenings when he was more awake anyway.
I bought a whole new back door to be able to get a cat flap fitted - so where there's a will there's a way! However be prepared to pay for it as it ended up costing almost £200 once we'd had it fitted. (not including cost of catflap which also isn't cheap if it's a microchip one).
I also live in a small flat so was concerned about where to put a litter tray... it's ended up in the bathroom... it's a bit of an awkward spot but given that no one hangs out in there too much it doesn't really bother us and other than that it had to be in kitchen so was getting in the way. Having said that he doesn't use it anymore and goes out in whatever the weather to use the garden. I daren't take it away as that will be the time he decides he's desperate to use it again I expect...
Our neighbours pop in a couple of times a day if we're away for a few days and the plan for our longer holiday was for someone to come and house sit for us and/or pay a pet sitter rather than use a cattery. I think that would upset him (it would upset me anyway, the thought of him being in a little pen and not knowing if we were coming back).
Part of me wishes we had got two cats now though and you should perhaps give that some thought as they will keep each other company... Good luck!