Without knowing more about your personal financial situation, it is a little tricky to give tailored advice.

Besides becoming familiar with real estate niches, consider enrolling in beginner-level real estate courses or reading books and online resources specifically tailored to beginners.

(To me, arbitrary implies a certain randomness in the choice - one that would not be well-tailored to solve the problem.)In any event, I am sure we both agree that this idea is never going to see the light of day - at least not during our lifetimes.

But now you've got the headache of running a business that you may not know anything about.I would suggest the OP talk to a tax attorney (which will, coincidentally enough eat up some of those profits) to discuss a strategy that can be tailor made for her specific situation. 

My advice is to get with a real estate savvy CPA to get tailored advice and also a solid bookkeeping methodology to implement. 

Use these calculations - tailored to your market - as a benchmark

I have much cheaper policies that are tailored to what I need.

If you are using multiple papers consider the same ad or an ad that is tailored for the audience likely to use the specific papers.Figure that you need 6 to 12 months of results before you can really spot trends.

If you don't have it then ask the question "what do I have" and tailor your acquisition accordingly.   

Next, I would discuss with a CPA who can provide tailored advice unique to your situation.