Financing is always going to be a little bit different for investment property, however, a duplex, triplex, or four-plex in most cases can be considered a primary residence for financing purposes if you live in one of the units.
2)Inspection
Inspections are conducted in much the same way as a regular home and are strongly advisable. The cost for an professional inspection on a duplex or triplex can be higher since there will be multiple dwellings to inspect.
3)Valuation
Compared to a regular single family home, much more attention to the income generated from rents is used to determine the value of a duplex or triplex. You should always know how much income the property can generate before making an offer on a plex.