You should give them a pest-free home, then make them responsible for ordinary pest control after that.I also recommend educating yourself on how to handle small pests like this, then educating your tenants to handle it themselves.

Feel free to reach out if you have any more specific questions or if you feel like I can help at all.

So he will get some of the profit tax free. 

You don’t have to necessarily retire with debt-free assets.

Feel free to reach out with any questions. 

Also, the one owner has lived there rent free for 12 years and will get capital gains exclusion for primary residence.

I'd just use your own spreadsheetHappy to help, feel free to PM me

The Buyer agrees to use commercially reasonable efforts to secure such financing within [Number] days following the execution of the PSA.Closing DateThe closing of the transaction (the "Closing") shall occur on or before [Proposed Closing Date], or such other date as may be mutually agreed upon by the parties in writing, subject to the satisfaction of all conditions precedent set forth in the PSA.Condition of TitleThe Seller shall convey to the Buyer good and marketable fee simple title to the Property by warranty deed, free and clear of all liens, encumbrances, leases, tenancies, easements, restrictions, and other exceptions to title, except as may be expressly approved by the Buyer in writing.Property DocumentationThe Seller shall deliver to the Buyer, within [Number] days of the execution of the PSA, all documents and information relating to the Property in the Seller's possession or control, including but not limited to, title reports, surveys, environmental reports, leases, service contracts, permits, and warranties.Non-Binding NatureThis LOI is intended solely as an expression of the mutual intent of the parties with respect to the proposed transaction and does not constitute a binding agreement, except with respect to Section 9 below.

Feel free to reach out directly with any questions.

The 1031 exchange is only for investment property to investment property.In your mom's case, she probably qualifies for the primary residence exemption and the first $250K of profit in her sale would be tax free.