Every marketing strategy has to be adequately design for you, your time and what you like to do.If you don't know start with one and move to NM the next one.

There's plenty of companies who design and install for contractors for reasonable prices.

My personal example is a one bedroom condo I’ve held my entire adult life - and this is in a top tier market - Dupont Circle neighborhood in Washington DC.

Most take near a year in southern Ca, but you hear of exceptions in both directions on that timeline.What some developers are doing here is leveraging the affordability issue and getting permission to build additional ADUs by designating some as affordable or semi affordable units.  

BiggerPockets is full of resources designed to help you along your journey, whether you are just getting started or a seasoned investor.

After 2 years you can apply for a “Rent consideration” (I think that’s what they called it) as long as you still live there and that may allow you to increase rents by more than the annual allowance (probably designed for unit that are very low rents).

The new design takes the home from a 3 bed, 2 bath to a 4 bed, 3 bath, 2,400 sq ft rambler on a large lot in highly desired area.

Quote from @Sherry McQuage: Make sure to check the zoning to make sure mobile homes are permitted there; check for any hazardous waste designation for the area; will you need to have the parcels surveyed out in order to sell the size you intend? 

If there is no designation I would use an X as you stated.

For example, I mention that every adult must pay a $30 application fee, pass my credit/criminal background, make a combined income of 3x the rent, and whether or not the property accepts pets.