....sell and lease are well adopted issues for agency law.What you can do is work for an owner in an employee capacity and only manage properties for that owner.

I'd think long and hard before changing the ag tax status of 600+ acres, in fact, I hope you move some animal on that at times (leasing may do it) to keep that status as here, you lose it in 1 year if not used for ag purposes, it reverts to undeveloped land-residential.I'd also suggest you look into seperate legal descriptions being made for the division of the property and if that would kick in any tax issue or transfer.

I spend the rest on various things, including 2 properties that do not produce income,( horse corrals and 35 acres outside of town for ag/recreation use).

You need to get real educational materials, like Real Estate 101 at a college book store or a test manual for agents from any real estate school.You learn requirements from real estate organizations that supervise activities, like American Land Title Association, HUD, state statutes involving real estate, look to professional organizations on line of appraisers, loan officers and brokers, Board of Realtors.

@Dahlia BerdugoI've been pulling probates for ages and there's one thing I can tell you.

Listings are very important for agents.

Also going to the groups you can get all kinds for business referrals for agents and money people and just about anything you might be looking for.  

Unless you're talking purely retail sales between regular buyers and sellers where the buyer thinks getting the house for $0.01 below asking price is a steal.need to dial for agents.. if one agent wont submit it talk to another that will. or simply go direct to listing agent and write your own contract.. that acceptable no law says you must use a buyers agent..

It isn't unusual for agents to start with a big player and then move to a smaller one(with better commissions) once they get more established. 

The cost of the classes is nominal, but the value of my time spent studying for the test and maintaining the license each year isn't worth the investment.I also don't invest money in RE licenses for agency brokering, appraiser licenses, inspection licenses, etc., etc.