I want to offer her $350,000 for the condo (its a fair price for it), 5% down payment ($17,500) and pay her monthly $2,000 for 3 years, after which I would refinance and pay her out.

IF the property is different - then maybe the program  being offered is the only one thats  avaiable 

You need to review the mortgage and title commitment for what parcels and legal description are included in the mortgage you took out.

***This is not legal of advice.

If you already manage your 4 properties, you can build on those systems you already have in place and offer your services to other landlords and investors.

Generally the listing realtor won't show your offer favourably with a vtb.I personally found the best owner financing comes from motivated vendors, in the private market. 

I ran across this company/tool here on BP last week and have been looking over what they offer. https://www.houseflippingspreadsheet.com/Yes.

I worked for Zillow Offers.

.- Service providers are offering more and more operating services. - Lenders are not balance sheet lenders.

FOLLOW THE K.I.S.S method plan (keep it simple and stupid).Find and hire a real estate agent that understands multiple investment strategiesGet pre-approved - see what options you havebased on your pre approved price - identify an area you want to invest in that you can affordLeverage the agent to : bring you properties, assist in pulling comparables (you should know your comparables of the area you are looking in, this is for a second opinion) review and confirm your estimated rental income, assist you with acquiring the property, and have a list of resources you could use; contractors etc.Looks at properties and make offers that work for YOU.Also,Do not pull your IRA money out, leave it there and let it grow - leverage this to meet your lenders reserve requirements.Buy Multi family to holdBuy single family to fix and flip and produce more income to buy more multi families.