First off, welcome to Freedom, hope you'll enjoy your stay!
In regards to the questions:
1.Multiboxing is allowed and you are allowed as many accounts as you want(As far as I'm aware.). Just that if you attend events that have a lot of people already, then multiboxing might put unnecessary pressure on the host.
2. You can have custom RP locations built and there are many of them around already. Player housing is also a thing so if you want you can have a house made.
3.Profiles aren't a requirement but they are nice, I'd suggest getting TRP if you don't have it already because most people here use it(The 4.3.4 build, 1015 if I'm not mistaken.). And the only perks of having been on longer than others is having progression, aka rank or more power(This doesn't mean you would always have to lose to an older character though.)
In regards to the questions:
1.Multiboxing is allowed and you are allowed as many accounts as you want(As far as I'm aware.). Just that if you attend events that have a lot of people already, then multiboxing might put unnecessary pressure on the host.
2. You can have custom RP locations built and there are many of them around already. Player housing is also a thing so if you want you can have a house made.
3.Profiles aren't a requirement but they are nice, I'd suggest getting TRP if you don't have it already because most people here use it(The 4.3.4 build, 1015 if I'm not mistaken.). And the only perks of having been on longer than others is having progression, aka rank or more power(This doesn't mean you would always have to lose to an older character though.)