Most likely you don't know much about the ground level work and must trust your professionals to give you the right advices for you to make decisions on.

You want an accountant who can help you strategize and who is responsive when you want to know the consequences of the financial decisions you are making throughout the year.Good luck.

For the first part of your question even if you were working with a realtor, I don't personally know many that have a true pulse on rehab costs and I wouldn't make any investment decisions based on their rehab cost projections.My suggestion would be to study how to evaluate the Big 6 rehab costs: roof, siding, windows, HVAC, electrical, and plumbing. 

Any issues with fees, management, or decision-making?

However, people don't follow this and will rent out or move to an LLC after closing, your decision.

Which is guiding my decisions. 

Ultimately, your decision should align with your comfort level regarding your finances, personal needs, and the housing market outlook.

Definitely still expensive but it's been a great decision for us.

I'm looking for any Knowledge that can help me make a sound decision thanks. 

How would these design decisions affect revenue?