However the house has solar panels and 22 years left on the contract.

Half of the house was paneling the other half had drywall, so I tore out all the paneling to replace with drywall.

Or you can use floor patch to fill in valleys.Slopes that are continual are generally not a problem; if the floor is flat but unlevel the flooring doesn't care, assuming the slope all runs to one direction; if you have multiple slopes in different directions that will be a problem.

It was demolished and now we have a flat lot.

It was demolished and now we have a flat lot.

Hopefully your existing electrical panel can accommodate the required double pole breaker this will avoid the extra cost of installing a sub-panel.

The listing agent flat out told me he didn't and wouldn't present the offer. 2nd I discovered I was allowed to do so but not to negotiate.

@Russell Brazil that makes sense in your case that you are bringing yourself to market standard for properties that are off market or offer basically no commission but for OP's situation where the agent seems to be charging a flat $495 fee for something, I've never heard of that, because they don't know what will be bought yet and if it offers a proper commission. 

Work on single-family homes — the bulk of the housing market — was flat.

insulation in ceiling & on walls, heat/A/C unit, electrical & lighting, perhaps need to upgrade the electrical panel in there, replace garage door with something else, new interior walls, drywall, bathroom fixtures, some kitchen appliances, and finishes (paint, tile, etc).2. we have all types of Contractors here, from high end to fly-by-night.