Some other thoughts:  On the listing end, one service you may want to offer is staging services.

. § 14-11-702, which reads as follws: (b) Without excluding other activities which may not constitute transacting business in this state, a foreign limited liability company shall not be considered to be transacting business in this state, for the purpose of qualification under this chapter, solely by reason of carrying on in this state any one or more of the following activities: (1) Maintaining or defending any action or administrative or arbitration proceeding or effecting the settlement thereof or the settlement of claims or disputes; (2) Holding meetings of its managers, members, or other owners or carrying on other activities concerning its internal affairs; (3) Maintaining bank accounts, share accounts in savings and loan associations, custodial or agency arrangements with a bank or trust company, or stock or bond brokerage accounts; (4) Maintaining offices or agencies for the transfer, exchange, and registration of membership or other ownership interests in it or appointing and maintaining trustees or depositaries with relation to such interests; (5) Effecting sales through independent contractors; (6) Soliciting or procuring orders, whether by mail or through employees or agents or otherwise, where such orders require acceptance outside this state before becoming binding contracts and where such contracts do not involve any local performance other than delivery and installation; (7) Making loans or creating or acquiring evidences of debt, mortgages, or liens on real or personal property or recording the same; (8) Securing or collecting debts or enforcing any rights in property securing the same; (9) Owning, without more, real or personal property; (10) Conducting an isolated transaction not in the course of a number of repeated transactions of a like nature; (11) Effecting transactions in interstate or foreign commerce; (12) Serving as trustee, executor, administrator, or guardian, or in like fiduciary capacity, where permitted so to serve by the laws of this state; or (13) Owning directly or indirectly an interest in or controlling directly or indirectly another person organized under the laws of or transacting business within this state.Good luck!

There are now a few new startups out there to help you set up a co-living arrangement with the goal of putting people with similar interest into the house and the app helps screen, coordinate and collect rent. 

I have considered offering a similar arrangement for window AC units but doubt it would be worthwhile due to the seasonal nature and added labor cost for installation and removal each year.I think that offering a washer and dryer is a nice amenity and can make a little money in the right situation (either from a laundry fee or as additional rent) but I doubt that the added cost and maintenance of coin operated machines would make it worthwhile in a 2 unit building.

Are there any verbal agreements or arrangements between the current Landlord and Tenant?

Certain tenant-paid utility payment arrangements prohibited; Notice of change in payment arrangement.

Are you in the preliminary stages of real estate investing?  

I heard that Bosch was speaking some months ago at a real estate club that sometimes has a pitch-guy on stage, so I discounted Bosch's program.

I think you should try to stage in such a way that it flows, but make it noted that furniture is not included.

She has no family and no heirs, the intention is to leave everything to the sheep and a trusted animal care organization :) The question is, at this stage in life, what is the best use of her assets and when is the best time to enjoy the reward of her financial, energetic and personal investment?