My advice?
If you have a budget ... then don't spend all of it to buy the RC
Unless you are going to buy it and stick it on the shelf then there are ALWAYS running and upgrade costs. Leave some money aside for that. It is a big part of the journey and fun of owning an RC.
If you are not just buying it to put on a shelf then there are two big parts:
1. running it
2. upgrading, maintaining, fettling, cleaning it.
1, running it, ..... leads to breakages and parts wearing out, or frustration with the gear that came wiht it and upgrade-itis. and that leads to number 2 - maintenance.
e.g. hit a curb (dont run somewhere with curbs) - break an arm and order parts.
or ... misjudge a jump and replace X, y, z.
or get fed up waiting for batteries to charge or short run times and... buy more batteries (never cheap) or a decent charger.
2 - upgrades, maintenance etc.
you run it you will break it.
what tools do you have? decent tools make working on an RC a pleasure. bad tools make it a total PITA.
keep breaking particular part? upgrade it
tyres dont work where you run? buy new ones
seems slower than you wanted or got used to the speed? now you are buying higher cell count batteries or better motor/ESC.
be realistic.. These are all emotional not rational purchases. That means logic and reason go out the window. My prediction? if you spend £400 buying a car you will have spent another 2-400 by the end of 12 months as part of owing that RC. (e.g. tools, batteries, chargers, wear and tear, upgrades, etc, etc).
so if you have the money go and buy it, enjoy the journey and have fun. just go in with eyes open.