I have found a property that I like for my new primary residence and I am trying to see if the seller is open to a longer duration close where I rent from the seller for 90-120 days to allow enough time for the investment properties to get leased.I am also considering asking if they would be willing to explore a seller-financed option but I don't know how to structure that so that a regular seller might find that more attractive than a regular closing. 

The best option would be to regularly attend real estate meet ups and get into the right circles.

Alan CeshkerAs most regular posters know, I’ve done many sub tos, wraps, etc. both on the buy side and the sell side, but mostly concerning commercial, not residential property.Here are some of my thoughts….1.

Moving is expensive and regular, incremental rent increases at lease renewal are expected and necessary to keep up with your operating costs. 

(Minus the small percent of the payments they’ve made that’s been considered capital gains.)My understanding is the 60 payments they make will be split up in to interest (regular taxes), capital gains (15% usually), and principle pay down (non-taxable.).

Excel tells me how much all of the regular things are (mortgage, insurance, etc), but the notebook is where I track everything for taxes and what I grab when I do my taxes (along with a file with all the receipts and copies of bills). 

There is probably no regular trash pick up or it is by a local guy with a truck3.)

The worst case you would have to spend couple hundred or thousand extra over a regular move out rehab to clean up the extra stuff etc.

Listen to podcasts, watch YouTube videos, find others in similar boat and meet regularly online to discuss. 

We regularly handle personal income and corporate tax filing, and have tons of tips, tricks, and free educational articles on these subjects.