I have my eye on a 70s trailer home, 2bd 1 bath, with a little porch and two small additions, a mud room and a dining nook.

Who told you that the proper way to spackle a tiny nail hole is to put a big 2x2" lump of drywall mud on it?

I have a new tenant that runs the AC like there is no tomorrow 24x7 without any breaks understandably so as he works from home.The AC has aged so much so that it seems like it may not be able to handle such high usage as I have been observing some undesirable side effects on my electrical system which was not observed with my previous tenant who was a light user.

The scope of the rehab: All New Interior Paint Some Exterior PaintNew Floors in the Master Bedroom New Stainless Steel Appliances Painted Kitchen Cabinets and Added New Hardware Tore Some Kitchen Cabinets Out and Added Floating Shelves New Light Fixtures All New Sod in the Backyard New Privacy Fence Interior Drain Tile and 3 Support Beams Added to a Basement Wall Epoxy Painted the Basement Concrete FloorNEW HVAC System Framed the Whole Basement Out and Hung Drywall - Mud, Taped, Sanded, And Painted All in all the live in rehab took 6.5 months The numbers:Bought: $125kRehab: $11k (1/3 of that was the new HVAC system) Appraisal: $168k I was happy with the refinance appraisal number I gotI am able to refinance out of the PMI, lower my interest rate, and lower my monthly payment I forced about 30k in equity I did not do a "cash out refinance" as I wanted to live my equity in the home and pull out a HELOC in a few months to allow for a purchase of another property or a "rehab fund." 

, concrete, floor joists, sheetrock, tape, mud, paint, romex, finish floor and interior trim...I use $7 tube sealant when I paint, and exterior paint @$38.

You'll have to begin having these direct conversations with lenders to understand if they truly will be a valuable partner in the process or if they will drag you through the mud just to sell something.

Properties of this nature easily become defacto transient hotels if located in undesirable areas. 

The existing floor in the picture is a thickbed tile floor mudded in circa 1945.

We did all the work ourselves (except all wiring, panel and mudding drywall)We want the appraisal to come out great of course but dont want to raise flags about permits or any other things we might shoot ourselves in the foot for.

The new build areas have property higher tax rates due to a unique concept that we have called MUD's or Municipal Utility Districts.