We do retain a property management company and after asking them, they must distribute the lump sum to us upon receipt (they cannot hold it off until 2023).

The buyer gets a deed.A land contract is where you retain title to the property.

would the lender allow you to move out in 2 years and retain the same loan terms?

If the original balance and proceeds need to go back into the 401k, how do I make sure that I can retain my split?

We sign a joint venture agreement but the JV partner retains ownership of the property.  

It's a 1870 house and has structural issues in the foundation and retaining walls around the house.

Lucas Carl , sounds like there are some red flags and it could turn into a big commitment of your time.Since what they are asking for is more in the mentoring realm than RE agent realm, ask for a $3k-$5k retainer to see if they are serious about your time and theirs.

In Coconino county if you pay the subsequent taxes (sub taxes) then you retain your lien position - meaning if you pay the taxes for each year during the 3 year redemption period, then you can begin the tax lien foreclosure at the end of the 3 years.If you choose not to pay the sub taxes, then the county will take the lien amount you paid for your original lien, plus any interest earned, and roll that into a new lien that will also include the next year of taxes.

A portfolio loan is more of a long term traditional loan that's simply retained in house as opposed to being sold in the secondary market, at a reasonable rate, so there's no need to refi out.

I talked to my attorney about something similar whereby I owner finance a property to an Owner occupant and have property on land lease or retain partial ownership.