If I am getting a primary residence mortgage loan for 3.5% down,  Is the lender allowed to know that I plan to rent the other rooms?

Btw, it was 2%, but don't tell anyone..smh. lol Yes, it was tight- I think I was looking at about $200 (wouldve been my lowest cashflow to date) but my plan was to clear up remaining debts and also its already written that next year my rents were increasing to $1900 anyhow so I was going to ride the wave.

Not all plans are the same.

Despite these, the successful sale at $82,000 highlighted the importance of strategic planning, effective project management, and strong partnerships in maximizing profitability in real estate investments with Partner Driven.

There is nothing wrong with your plan. 10 years ago, I inadvertly did it as I bought a home lost my job and move away within 4 months.

I plan on buying a SFR in Dallas Fort Worth area for about 220K.

Despite these, the successful sale at $465,000 highlighted the importance of strategic planning, effective project management, and strong partnerships in maximizing profitability in real estate investments with Partner Driven.

I never ever plan on going after negative cash flow.

It may be a good idea to have some face to face conversations if possible before you spend any money on deals. 

An experienced entrepreneur in the same field has offered a partnership, planning to invest $25,000 with a projected $50,000 profit.