I generally refinish the tubs as long as there in decent shape.

Sam,if you are doing worcester, MA then refinish the floors or vinyl plank. 

The house will have all new VLP floors, new exterior/interior paint, refinished cabinets, countertops and appliances, new HVAC and roof, fixed siding.This is my hometown.

I once had a older SFR that had old terrazzo floors, needed to be refinished, but didn't have the funds; bought a huge area rug and it rented immediately!!

If we wait for leases to end, we will be at the end of the year and way past the college student window of July/August which would be our target audience for the refinished units.

:I like the refinished hardwoods and vinyl for the kitchen.  

In a few of our historic homes we refinished the hardwood floors in the living room, hallway, and bedrooms and keep those original.For tubs and surrounds, we prefer a porcelain or ceramic covered steel tubs or fiberglass.

BTW that flooring looks a lot like yellow pine; you might want to consider re-finishing it if this is a flip. 

If the floors are beat up now, your best bet is either a solid hardwood floor which can be refinished multiple times, or an Allure flooring.

How much is it going to cost you to refinish those?