Did you consider US for your time building? (Florida / California) cost of hour is much cheaper less than 100£ per hour with fuel included on a C172 and 70£ for a a C152. Even if you pay flight tickets and accommodation will cost you less money than building those hours on UK.
I did all my training in USA under FAA and then convert it to EASA, and didn't have much issue doing CPL, even if I already had 100 hours IFR by then.