Second decide on residential or commercial real estate or related business like note buying or private investing. 

I have self managed my properties for 5+ years and would say i am moderately experienced doing all rentals, property management, contracts and other related responsibilities.  

I would guide you to @Saul L. since he has already came recommended and he is from your backyard so can relate. 

I had used an S-Corp for a real estate related business (though no real estate was held in it).

I see two (potentially related as they showed up together) issues.No heat - Maybe a bad heating element?

@Artem Lopatchenko some banks do in fact require a business plan if you are attempting to receive a business line of credit or some kind of business related loan. if you can set up a flipbook with all the numbers that you need to show that would be my recommendation to you.

I'm in Oakland County as well and am relatively new to the exciting world of real estate investing.I've found Bigger Pockets to be the most comprehensive source of info around all types of real estate investing. 

For your first one, you're going to want something relatively turnkey unless your background has been in construction or your are a glutton for punishment and want to jump right in and learn a lot of lessons all at once. 

Also left a note on the door saying I was interested in buying the house hoping a relative might find it and noticed that the mail was in someone else's name?

A lot of people get started trying to wholesale properties, as it involves locking up properties for a relatively small amount of money.