LiPo or NiMh when on a budget?

[RCmad79]

OK, so I am on a budget of £100 - £120. I am getting a B4 that needs radio gear and batteries/charger for £65 that leaves me £35 - £55. I can get radio gear for £30 from multiple places (not looked on ebay yet), which leaves me £5 - £25. I know a NiMh fast charger costs about £20 - £25 and I have an 1800mah nimh from another car I use, also 1800mah Nimh's are only £12 each at LHS. I was wondering if it is better to use Nimh to start with and save money after xmas to get LiPo batteries and charger??