I haven't tried it myself but speculating on how to make enough money for a bond in one month. (You will have to pay for one month of membership IMO)
As a member,
LMS makes insane money, F2P doesn't have rewards. LMS has no requirements which means you can be making 1m an hour the second you start your account but only if you're very good.
LMS is VERY hard. Everyone gets the same gear and stats and the players that play are very skilled at the game. It took me 2-4 hours to make
900k.
Herb runs are very profitable, farming is a fairly cheap skill to train as well. Herb runs have a lot of requirements though. You can start farming herbs fairly quickly but to be able to utilize all the patches takes a long time. I make like
150k a full run which takes me like 5-15 minutes.
Bird house runs Are slower money than herb runs but faster and easier. They can be completed every 50 minutes and bird nests sell for 3k each, you'll usually get a couple. You'll normally net 10k each run but sometimes you'll get rare seeds that can be worth
50k-200k. I've had runs make 200k-300k. I recommend bringing a mortar a pestle to crush the nests and just banking a bunch of them before selling them all.
Managing Miscellania is probably the most passive form of income in the game. It might not help you on your first month but doing all the quests relating to Miscellania is really important and will give you a steady stream of items you can sell for profit.
Slayer apparently makes money but I put more money into it than I get out usually. It also has a lot of requirements to do it effectively, I'd steer clear of it unless you have extra money. Pretty much all combat is pretty weak on the money making. Only work with combat if you have a particular goal in mind. If you unlock fossil island for bird house runs you can kill Ammonite Crabs to train combat for free. It's very very idle.
If anyone is interested in making a guild with me let me know, we could help each other out with making money.