Manufactured House as Primary Unit to Future ADU--Can it be done?

[Amy Turnbull]

I found an inexpensive one acre property with an old manufactured home in Willamette County, Oregon. I want to buy the property with my daughter (co-sign) so I (she, as co-owner and future occupant of the primary/man unit) can put an ADU on the property. (Local laws require one of the units be owner-occupied.) The idea is to consider the single-wide as the "primary" unit (that's how it's being sold) and apply for a construction loan to finance both the primary unit (the man home) and the future ADU. The question is: can it be done?