While doing this you need to be actively networking.

Going forward, I don't intend on being an active agent buying & selling homes, so my question is, short of giving up my license, is there any option to not pay all the quarterly board dues & broker office fees, E&O, etc., but keep the license in some "reduced" status, so I can still possibly reap the benefits of the real estate professional status for real estate investing.

I want to be an active part of the boots on the ground team until I know that I am working with the right people.

So I would suggest getting in touch with as many active MUF brokers that you can connect with just so you get the off market properties.

One for passive income and one for the active side of things.  

I've talked to a few friends who are actively in the business and I'm very intrigued and I've blazed through the ultimate beginner's guide as well. 

Does anyone have any tips on how to handle cleaning of the unit after guests leave?

You get a realtor license but you can not perform real estate activities. 

There are a number of active posters here from Greeley so you will certainly find some folks with knowledge in your area.

If you have active deals going, then the actions will come on their own. i.e.: If you need to close, your agent/attorney will let you know what to do.