In each market I operate in I have someone available for showings this person is usually my runner who is responsible for quality control and restocking inventory but I've also used a cleaner for this.

Every single transaction will be recorded and information will be easily available.

Tanya**Tier 1** - Do it yourself (DIY) using the resources available on the website.

It depends on a variety of factors: your goals, your time constraints, your available capital, your desires, your timeline, etc.

There are literally thousands of syndicators/crowdfunding sponsors out there with available deals.

You can provide recent bank statements that display your available cash.

There were none available anywhere in the US. 

Since your realtor said it's part of an estate that usually means that more properties are selling unless he was just saying this one house is available because someone died.

When looking at other STR listings in Detroit I see that they are available way more than 90 days per year.

Every system you try will have flaws, or you may salivate over a feature that appears in other software.Some familiar names are mentioned frequently: Stessa, Apartments.com, RentRedi, TenantCloud, Innago, RentManager, Avail, Rentec Direct, Doorloop, etc.I recommend conducting thorough research on each app online to understand their offerings, pricing, etc.