Ultimately, you know more about your situation than anyone else on here. Multitools can be a boon if you do not have access to any other tools, but they invariably are not as good as specialised tools - they are very much the jack-of-all-trades, master-of-none in the tool world... I would still, if you are on a very strict budget, suggest you get some decent pliers, a decent set of screwdrivers, a hammer etc, rather than sink ~£100 into a good and usable multitool (if you buy a cheap, Chinese one, it may not last/hold up if you use it robustly).