**Neighboring Property Condition:** The adjacent row house doesn't have a roof, which may be contributing to my issues.Additionally, I'm struggling to find a tenant.

You can take out an equity line or fixed rate second on your current primary to contribute towards the down payment of the 4plex. 

My brother and I would like to be co-owners to the new property but our contribution to the purchase of the new home is by way of investment loan, so let's say my parent's home sells for 500k and they want to go in on a $1M piece of property.

This has contributed to lower inventory as sellers are hesitant to walk away from their historically mortgage costs, but the start of the pandemic era rates is now four years ago (2020) and life events often eventually force property sales.

We have an S-Corp that manages both LLCs, so I can take payroll and contribute to retirement accounts. 

By prioritizing open dialogue, seeking expert advice, and focusing on equitable solutions, you can navigate the partnership dissolution with minimal friction, respecting each other's contributions while safeguarding your financial interests.Hope this helps!

@Alec Bildstein my advise in addition to attending meetups is to read the forums and see who contributes and adds value and find the folks that you resonate with.

Is % based on how much each party contributes?

I look forward to the possibility of working together and contributing to each other's success.

However, your situation—having a full VA loan, ample savings, and a pre-approval in a competitive range—puts you in a strong position to navigate these challenges.Given your circumstances and goals, buying a home could indeed be a way to build equity for yourself rather than paying rent that contributes to someone else's mortgage.