Speaking on a tax panel, and a breakout room on cost segregation.

If she has her own I would look at having whatever connection is made connect to her panel, and would try to find some middle ground with the tenant on you paying for one part (the part that gets the rebate) and she pay for the other (install) 

Purchase solar panels.  

What not to get.... 1976 Orange Ford Econoline Panel Van with Orange/Red shag carpet and a Fred Flintstone doll on the dash board!  

He understands that we are not going to pay off the solar panels.

If you were to listen to a panel that had expert capital raiser speaking.

Things to think about: separating the electrical and gas - each unit should have full 24/7 access to its electrical panel and each unit needs "thermostatic control" for its heat.

Some of the improvements include:Replacing the existing carpet with LVP (They had animals and there is a distinct odor)Replacing the acoustic drop ceilings (They painted the existing drop ceiling black)Removing a sliding glass door and replacing it with a french door for rental entranceReplacing the existing fluorescent lighting with can lightingReplacing painted wood panel with drywall, finishing, and painting said drywallMoving walls around to block off some areas and to make some areas biggerAdding a kitchen, which include cabinets, sink, range, and maybe a dishwasherCreate a path leading from my driveway around the backyard to the basement entrance.My space is about 1200 SF and I mentally prepared to spend about 15K to redo the basement to an acceptable quality level.

Someplace that old needs a thorough inspection of the foundation,roof,electrical panel and wiring,plumbing,water heater,and HVAC.Especially in a harsh weather climate like Wisconsin or anywhere up north.You really wanna check for long term water damage to the foundation and base of the property caused by years of snow and ice, no moisture barrier installed,and poor drainage.The cost of repairing these items should be factored into your bid price.You didn't say what the after repair value of the property was,only that they were asking 135k.If the ARV is only around 135k after improvement costs then 100k and just cosmetic changes would be decent.However,if you find after a thorough inspection that the place needs far more work to get up to code and up to stuff,then you need to show the owner all the problems and negotiate the cost down to cover those repairs.

Notate where the electric panel is and how the property is metered.