Yeah mate, i'm not having a dig or anything but the Atomiks 'n' Orions 'n' such arn't any good, they may be cheap..but there's generally a reason for that, right?...I understand you will be using them to ass around on a farm but that doesn't mean you have to sacrifice quality or anything does it? after a while this and that will break or bend odd parts will be breaking and you'll be like damn i've spent over double on this repairing it and I could've got a bike for just over double the price and wouldn't be worrying about all these repairs and i'd have a bit more power. Because also after a while you will become more confident etc and want to do perhaps even just tiny jumps or go faster than you can and you just wont have the bike to do it...simple.
My suggestion, if you can save $500 you can save $1000...if you're not going to go for the top end china bikes like pitsterpro, mso, ciniworks, motovert, braap (in no particular order) etc etc atleast go for a pitpro or something. As some guy said up higher ^^^ it may be annoying to save a little extra, but you will thank us later when you can do a bit of jumping and go faster and arn't always repairing it.
Just trying to help out....thats my 2 cents anyway. goodluck.