can the purchase of newer mobile home qualify for reverse mortgage

Probably not. In fact, in many cases a home must be at least one year old to qualify for a Reverse Mortgage.

Some Mobile Homes are eligible for a Reverse Mortgage. In most cases, you must meet the following criteria:
-- All borrowers must be over age 62
-- Own your land (technically also if they have 99 year lease)
-- Home manufactured after June 15 1976
-- On a fixed foundation
-- Must have a HUD (Department of Housing & Urban Development) Seal affixed to the manufactured home (this is done by the manufacturer, not a retrofit)
-- Owner is willing to pay for a structural engineering report, which the property must pass (Costs range between $200-$500 depending upon location).

However, I would suggest that you meet with a Reverse Mortgage lender before you commit any funds to updating your property.