Also, be wary of the emotional support animal thing, as they may try that route in order to get the pets in without your consent, so read up on it here in the forums and maybe have a required form ready so they can't just use the cheap online letter that almost anyone can get these days.   

They do have a 0 down payment option along with a lien of sale if you move out without their consent but I don’t understand what you mean.

Twenty-four hours is presumed to be a reasonable notice in the absence of evidence to the contrary.(9) Promptly commence an action under Chapter 1923. of the Revised Code, after complying with division (C) of section 5321.17 of the Revised Code, to remove a tenant from particular residential premises, if the tenant fails to vacate the premises within three days after the giving of the notice required by that division and if the landlord has actual knowledge of or has reasonable cause to believe that the tenant, any person in the tenant's household, or any person on the premises with the consent of the tenant previously has or presently is engaged in a violation as described in division (A)(6)(a)(i) of section 1923.02 of the Revised Code, whether or not the tenant or other person has been charged with, has pleaded guilty to or been convicted of, or has been determined to be a delinquent child for an act that, if committed by an adult, would be a violation as described in that division.

What actions will require the consent of both you and him, and what actions can be performed by either of you individually.

The last payment of $5K which was supposed to be paid by us once the inspection repairs were completed, were taken out of our PM account and from rent-guarantee payments without our consent.  

If the total obligation may be assumed with consent of the note holder(s) you might include that!

The title co. therefore wanted to make sure the PR and adults heirs consented to the sale by signing the deed.

Get their written consent to do so, and run it.

They use to be one of my favorite strategies, not anymore.No, you can not assign any financing contract without the consent of the seller-holder of that contract, bi-lateral contracts may not be assigned without consent.If a buyer under a contract for deed wants to sell, they may, the transaction is treated as a sale with an underlying mortgage to be paid off.

No issues.If the seller's property isn't free and clear, use a Sub-To and obtain title.You can have issues having a lease-option with repairs or rehab required as you'd need the owner's consent and willingness to work with you, a lease doesn't give you owner's rights to encumber a property by contractors or material suppliers, at least cleanly nor might you be able to obtain permits and insurance coverage may be more difficult.....so get title.Stay out of jail and don't get creative in financing without expert, (non-guru) advise.