Bevo

Ok, well iv recenelty had an erge to start riding again but havnt done anything or seen anything riding based in about 6 years. so would love alittle help on the matter. first thing is i need to buy a bike, 20" pref, budget being around 5/600 and as i only know/remember onzas i started there. can anyone throw me a bone to other 20" bikes? Any info welcomed, im abit of a lard arse tipping at about 14stone so need a hef bike to take my weight aswell as be worth the cash.