I contacted the company that owns all 4 tax liens and was told the pay off with interest would be 22k plus attorney fees.

Zip code 68104-Last years taxes = $1520-Purchase price and financed amount at 4.6% for 30 years = $120,000-Closing costs and funding fee (VA loan) = $9,200 paid out of pocket-Pretty much turn key property, minor repairs that I can do, less then $200 worth of work.

Has anyone had experience installing solar and have any feedback on whether this makes sense for a property like this?

Usually, these are accessed for a monthly or yearly fee.

In my experience the only way to make any money with a USDA property is to syndicate LIHTC funds and secure a developer's fee, as the rents rarely generate any significant ongoing cash flow.Kyle

A quiet title order will require 3 years of possession, and about $1,500 to $5,000 in legal fees and court costs.

You always need to include the HOA fees in your calculations, and might need to add "cushion" depending on what type of property you buy (some seem to have HOA assessments more often than others).

Funds would be extracted by active consultatoin fees charged by the Canadian entitie(s), and taken out by dividends.Considered a limited partnership for cleaner flow through pruposes, but was told that it is more difficult to get active consultation fees out of it and there is a withholding charge that could take up to a year to get back out to the Canadian entities.Your feedback is appreciated.

Fees vary by market and management company and when you have scale. 

More importantly, there will be high turnover which leads to turnover costs, more repairs, more leasing fees and just way more headaches - especially when you're supposed to be passively investing from across the country.