If I created a child series to hold an investment property (not collects rents though, just hold), is the corporate veil already pierced since the Parent LLC collected income for my consulting business?

For example, if a parent co-signs for a child but the child  graduates, gets a job and starts paying the loan that debt can be excluded from the parents DTI as long as there is proof and the payments from the child have been on time. 

I grew up in Traverse City and help my parents manage their portfolio of STR in that area.

I rented to my parents for 15+ years and when they past I rehabbed the house and sold it for $120k profit.

Quartz won’t get you a 5 star review or boost your ADR per se, but having a place parents can let their kids play may.

-the tenant is a friend of mine, and I believe his car and address for employment and bills is still listed at his parents' house a few cities over. 

I've been living with my parents and I am planning on getting an FHA Loan to purchase my first home.

Are they being evicted or is it a young couple who moved to the area and had been living with their parents until they found a place?

I tend to get him to agree with me bit by bit by showing him a different way to invest such that we can have a different future net worth trajectory than his parents (who have made and spent a LOT of money.)

My parents completed a 1031 exchange over 2 years in their own names – they file a joint tax return.