Quote from @Arvand Sabetian: Depends on your unit and size.

But if your budget is tight or your home only needs minor updates, your real estate agent can help you think outside of the box by suggesting simple DIY staging tips to help your home look its best.Bottom LineStaging your house properly can make it much more attractive to buyers, but it’s not a one-size-fits-all solution, and every home shines differently.

You may also need to provide additional documentation, such as proof of income and employment, and may need to have a co-signer who is a U.S. citizen or permanent resident.In terms of buying with an LLC, it can be a good option for some foreign buyers, as it can provide additional liability protection and potentially offer tax benefits.

It's adjustable based on size, erring on the side of generosity.

What are some companies that others are using to insure multi-families of this size?

How will you do so if you are W-2 employed?

But I would rather get a good-sized down payment that I can use to invest elsewhere and get a good sales price due to the cheap financing.

If so, as @Brandon Weis mentioned, they come in all "shapes & sizes".You'll get more assistance if you post an example here and ask more specific questions about it:)

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? 

That size and price are within range.