Honestly not criticising the mods, but I'm not sure I want one yet, and I've been on egos/tanks 6 months, cigalikes on & off for about 6 months before that.
I think the OP's budget is sensible for a first set up, most people love vaping, but there are people who lose interest, so £40-£50 is nothing lost if it helps you save just one week's worth of fags any savings after that are a bonus, but you've lost nothing if it ends up in a drawer and only comes out for flights.
I've bought one dodgy ego, but it was DIRT cheap. Broke another when I sat on it. The remaining 4 have been serving me well for months.
The other great advantage is that the ego/itaste VV have ego and 510 threading, so fit practically any tank you care to throw at them.