Thanks for all the replies!
TheAbomb12 : I will keep your advice in mind. Indeed, apart from the 250R, likely I will only be considering used versions of the others.
Jirki, Shannon: Useful numbers, thanks.
AaronMerlot: Why night time? Do they just not like to see you working on a bike? Any pointers on books, equipment and stuff? Your numbers were very useful. I didn’t get your “gear – 800$” number though…