The trade limit can be bypassed by buying membership (or redeeming twitch prime membership). You can buy membership really cheap off certain websites/discords too, like $2 for 14 days or so. You can also buy bonds from people for like $3-4 on this site. Membership is well worth the investment, for example you buy membership for 14 days costs $2, then you run a script (preferably a paid one of SDN or a private one). In P2P, low level methods such as Mort Myre Fungus can easily net 400k-600k GP and hour. If the selling rate for gold is about $0.5 (this is an estimate based on a few places, you could probably find someone who'll give you a bit more) then you'd make your money back in only 4-5 hours of botting. If you're careful and don't suicide bot the account you could easily keep in running for a week or two (up to the 14 days you paid for). By that time you'd have been able to make a hell of a lot more than your invested. In short higher risk but higher reward, I recommend trying it with only 1-2 accounts to start with.
Also something else I should mention is you can wait for twitch prime to come around. It's free membership if you have an amazon prime account linked to your twitch, 7 and 14 day membership codes from twitch prime are sold for around 400k-500k GP if you don't have an account.
Good luck, I hope this helped!