Lots of variables here but you need specifics on park owned units, tenant owned, utilities, collections, location, flood zone, etc.

I suppose my question was to see how different variables effect the terms...

There’s a lot more variables then what a census tells you when it comes to where to buy out of state. 

Now something happens during a flip and you need to calculate the distance between 34 beans so all the distances are equal, but the beams have variable thicknesses you are screwed.

Not to mention most builders are using some sort of variable financing which is subject to the rising rates, squeezing developers everywhere.

Real estate" is not one business or one type of investment, it is a number of related businesses or investmentsResidential, multi family, office building, warehouse, mixed use, retail, recreational, raw land, tech centersLarge, medium, small, microUrban, suburban, small town, rural, exurbsbDifferent states, different metropolitan areas, different cities, different neighborhoods, different blocks, different demographicsDifferent property age, different architectural style, different fixed expenses, different financing, different tenant mix, different tenant demandSingle net lease, double net lease, triple net lease, CAM, building allowances, rent holidays, lease length, buyout provisions, personal guarantees, lease renewal, cost of living increases, flat percentage increases, Different loan amortizations, fixed interest rate, variable interest rate, balloon payments, fully amortized, institutional loan, private loan, seller carry backBuy and hold, fix and flip, syndicate, partner, joint venture, self manage, professional manager, management company, leasing company, in-house leasing, real estate agent, licensing requirementsFederal laws, Federal regulations, state laws, municipal laws, rent control, eminent domain, set back requirements, utility easements, property taxes, special tax assessments, development districts, water districts, utility bondsPassive investing, active investing, portfolio income, business income, retirement funds, ERISA regulationsAsbestos, Clean Air Act, Environmental Super Fund, pollution control, water runoff, Flood plain, floodway, Flood control, Flood insurance, endangered species, wet lands Zoning, Planning Board, building permits, occupancy permit, community board hearings, noise ordinancesEviction laws, foreclosure laws, bankruptcy laws, civil liability, fair housing, tenant rights, disclosure laws, loan modification laws. 

And regarding pre payment penalties, you can arrange a higher interest rate on the loan to avoid it So they are passing along the interest rate risk to the end consumer via variable rate and paying more upfront in fees to avoid having pre payments penalties that ensures the bank makes x.

I have no idea what their algorithm is, but the variables as applied to whatever I'm doing work out really well with them.End of the day, YMWV - shop it and look for the best value. 

I know there are many variables at play when it comes to direct mail marketing.

Those will all be variables when searching for a lender to finance the deal.