Hi @Rodney Swindle ,
To answer your first question, appreciation is based on how people value the property. If the property looks like and is zoned as a SFH, that's how it will appreciate. If it still resembles a mobile home, then you would unlikely get that appreciation from the market.
I am not certain about the disclosure aspect of the property, that probably varies state to state. The last thing you want to do is mislead and agents or buyers about your practices though.
As a side note, you actually need to lay a foundation and attach the mobile home to it to be considered real property. This process can be very costly, requires zoning permission, in addition to all the items you listed. By the time you are done converting a double-wide into a SFH, you have spent as much as you would on the same sized SFH.
Best of luck!
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