I wonder if laminate flooring (Pergo) would have worked for heavy-wear tenants. I've always thought it was cheap looking, but recently saw a Pergo job that really looked like nice hardwood, just tougher and more resistant to pet scratches and spills.
To answer your original question, I think the key is not the type of repair needed, but having the right contacts to have it fixed cheaply -a really affordable handyman can make a place's interior look great without costing a lot.
I once heard from a real estate agent that buildings with structural problems are the best deal because no one wants to touch it, and owners will sometimes dump the for a fraction of the price, and an entire building can usually be propped up for a lot less than you'd think. For example, a building might be discounted $200K because of structural problems, but the fix is only $50K. I've seen a couple 'good deals' like this, but was never brave enough to take them on.