Need more info to help compass direction of main bldg, location of specified apt, year bldg erected and if any major remodels plus your d.o.b. to determine east/west personality and Kua# . Also have you done a research on the history of your bldg? and previous tenants? Did you do a complete space cleansing? Financially you need to take a realistic look at your budget and then proceed from there...many times the solution is our own actions/lack of actions.