She's 76 now and it's free and clear and supplementing her retirement very nicely.

I use Excel pretty much exclusively but am getting the need for some supplemental software to keep track of Business Cards, Invoices, PM Reports, Receipts, etc...

Also, would anyone recommend creating a website to supplement the above?

.- (Already mentioned) Car port or equivalent, charge supplemental rent to existing tenants for the dedicated spot(s)- Run utilities and pour a pad, turn it into an RV spot & charge by the night.- Site a tiny house or (2) and rent it AirBnB- Lease the land to a billboard company- Lease the land to a satellite or antenna company where they can put antenna's on your yard.- Coordinate with neighbor for their potential needs (direct lease to them)- Coordinate with neighbor for access to improve market value of your dog-leg parcel- Donate the land to the local garden club to improve the aesthetics and drive higher rents. 

@Andrew NairnAre you looking for actual plan documents or some type of template to supplement the record keeping or other functions of the plan?

It won't be a permanent supplement to a lack of income to service the mortgage debt.  

In my market the nurses have a choice to put the allowance towards the rental and supplement it.

Ultimately, I want to use REI to put away money for retirement and to also have as a supplemental income.

Meanwhile, they claim that a seller will be willing to supplement the monthly payment to (a) avoid trashing his credit and (b) participate in possible future appreciation.

So you would need to supplement with deals that are looking to exit (and stagger them to exit, say every year or so...so you could benefit from the price appreciation boost).