You're basically asking the age old question of, "to leverage or not to leverage". 

The building is older but the condition is all newer - and the appraiser was surprised - in her own words - of how nice it was on the inside compared to the exterior age.

The buyer was insistent on getting a working heater, didn't want a $5,000 credit, and there were no standard replacement because of the age and the size of the unit.

If they are VERY professional, they will have their processes in writing as verification that it is enforced equally and fairly by their entire staff. 6.

If they are VERY professional, they will have their processes in writing as verification that it is enforced equally and fairly by their entire staff. 6.

The lower price may be because of the age or layout. 

I just want to make sure we are not confusing it with the penalty for withdrawing from a 401K before retirement age which is 10%.

BUT we had to buy one for one of our aging parents.

I see I made a major deficiency in purchasing my current property with the age of the key items, e.g. gas furnaces, water heaters, washer/dryers, refrigerators, stoves, plumbing, electrical, etc.

As Joe mentioned above your age is going to be a huge factor to creating generational wealth as your investments will have more time to compound.