Separate different uses physically, and if possible legally. In community title schemes opposites do not attract. The archetypal dispute ridden complex is the one that contains residences plus a restaurant and bar. Mixed use executed correctly can provide significant advantages both in terms of the marketing and sale of your product and the lived experience of the buyers. Physical separation is great, (for example noise shielding) but so is legal separation. Consider for example, a BMS or layered arrangement to legally separate your commercial uses from your residential uses.