I'll second what Mike said about Ring Central too, it's a cool business phone app. 

Apparently, you haven't even talked to the owners yet, you have no idea what price they may want, what kinds of liens may be attached to the property, and there is a good likelihood no one has the actual authority to sell these properties, as probate may not have been opened, etc.  

The new owners can make improvements to the house, or you can say “with written authorization” (though the last will make it not feel like their house).

The resident agent must be a Michigan resident, a Michigan corporation, a foreign corporation with a certificate of authority to transact business in Michigan, a Michigan limited liability company or a foreign limited liability company authorized to transact business in this state."

No legal advice given, but I've spoken with both Houston and Harris County housing authorities several times.

Offhand, try SLACK, Wrike, Trello, and maybe Ring Central Glip.

I read this to state that if a home has a central heating system then any bedroom with a heat vent connected to this heating system needs to have a C/O detector installed in the room.

We had a very borderline applicant once, so we made her dad the tenant even though he wasn't moving in with her as an authorized occupant. 

Do you want pricing authority or not?

You should treat your information like it is valuable.The other concern is that as companies change hands and are sold to other companies, which happens a great deal, your information is then exposed to people you haven't authorized.