Well done for thinking about all the research etc as it is tempting to just 'jump' in blindly & hope for the best.
There are lots of stories on here of good times , but loads of bad times which ended up being expensive times.
I would say that you really need an emergency fund of £500 - £1000 that you can use for vets, birthing problems, first jabs etc.
This may seem a lot of money but sometimes not having to worry about money helps you deal with the problems you can be faced with a lot easier.
Good luck x
