Is this a money pit?

[KIm Butler]

I own a 2 family house and live in 1 of the units. There is no mortgage, just a home equity line of credit. We get $8400/yr for 1 apt. so should be $16,800 for 2 units if we move out and buy a single house for ourselves. Current annual costs including equity line pymt are $9,265. The problem is, eventually, we need to invest about $60K to do a new driveway, the rest of the windows, siding, and 2 bathrooms when the plumbing fails (house built in 1915).

Knowing that we need to invest that much more money into the house, is it profitable or a money pit?