not sure with the petrol ones, but the mid sized electric ones like i have realy dont like any extra weight. u can upgrade all the bits on them like brushless motors (so they dont wear and blow up alltho the one i have is still going strong after 3 months). these give huge amounts of power, but add weight and also require a larger battery which mean again more weight. i wireless cam is about as much as i dare carry alltho it would carry more it would just stress the motor more.
atleast u have a budget. and i suggest u look at £150 models if u can as i garrantee the other £50 will be on spares within 2 hours (main blades mostly). If u dont have any other budget for it in say a month then u wil b selling it as spares, ive spend about £200 on spares so far, alltho most of them are 'waiting' for a tree to step into my path lol.
They need to b set up tho, the slightest bend shaft or uneven blade makes it much harder to fly.
Coaxials are cheep (asky bell??) and easy to fly (including indoors), but are too easy to flay and become boring quicker.
Micro '3D' helis (walkera 52/micron v2 are within your budget including the needed spares, but are really fiddly to fly, not too reliable and not to good outdoors.
Esky cp/twister, can be hovered indoors if your good, but mainly outdoor stuff, easier to fly but still real '3D' helis, reliable but is on the edge of your budget for the complete kit (£50+ atleast for initial spares).
trex 450/600 are the largest 'petrol sized' helis, costing £500 upwards new, really well made with many mods about, but aimed at pro flyers really.
Petrol ones are smoother to fly, but cost £500+ for basic kits, noisy so really only for flying at club circuits and just a big no no for learning on.
try searching youtube for twister or esky cp helis, theres loads of clips about.