A lot of lenders used to apply 35% for expenses, but in the last several years, the numbers for supplies, labor, utilities, taxes, etc… have increased significantly.Also take into account the age, occupancy and how has the property been maintained, this will affect the expenses too

Are mobile homes more prone to these issues than a typical SFH and I sure increase those allotments? 

I'd start by looking at where the money is going and how to increase your income and lower your spending. 

Investors focus on adding Accessory Dwelling Units (ADUs) to increase income streams.

But, you will have increased the value of the property, allowing you to pull cash out for your next deal.

Start small with a multifamily property in areas showing job growth, population increases, or redevelopment potential.

The shorter the prepayment term has an impact on increasing the rate.4.

San Diego SFH rad average rent increase of $600/month last year (source Core Logic).  

Still renting and value keep increasing Lessons learned?

Alternatively, can you use either unit as an STR to increase cash flow even further?