Bot farm profits depend heavily on how bans are. You can make thousands a month (i.e. in December or July when there's like no bans because everyone is on vacation) or you can make a loss if you get rekt with bans before you make profit (Hopefully your plan makes back the investment in a weekend or the 16 hours Jagex doesn't work to avoid any losses).
If you want to invest little money you will need to invest a great deal of time into it instead.
If you invest more you can buy scripts for a F2P automated farm with no risk and a decent reward or a private script for a really good method or just get a bunch of P2P accounts on a common method. If 20 pounds is all you have, you'll likely be spending it all on the VPS or spending most of it on a VPS and the rest on whatever cheap decent script you can get your hands on. You'll also need to spend a shit ton of time doing everything manually. With 60 you can get a decent VPS and script and a few accounts but you will still need to do everything manually.
how can one do it auto?
ah ok, thats pretty fuckin coolSome bots have auto-progression features and automatic trading to mules.
For example:
Level 1 - Trees
Level 15 - the bots will go to Oaks
Then trade all the logs to the mule automatically.
ah ok, thats pretty fuckin cool
are the mule ones expensive?

