How much are the average closing costs (including agent service fee, closing fee, premium etc.)?

There are many affordable premium quality whole house water filters are available in the market. 

The reason I’m asking is because I’ve been talking to this lender, and I see they have a verified check mark on their profile with the work premium next to the check mark.

For example above $1M-2M might be capped or vice versa, luxury properties could come with a premium compensation plan since they are more difficult to market and transact. - In competitive markets for hot properties, how the buyer's broker is compensated will have a major impact on the option the seller chooses.

An additional benefit of a detailed engineering-based Cost Segregation Study is that it can increase potential insurance premium savings as well as provides support for the property tax appeals process.Additionally, it can help maximize renovations and improvements.A Cost Segregation study is an IRS approved federal income tax tool that increases near term cash flow by utilizing shorter recovery periods for depreciation to accelerate return on investment.

But if you can make enough of a premium by leasing them individually yourself then do it and F their feelings.

It seems you should be able to charge a premium considering the property details.

Flat roofs, old roof age, old electrical, cast iron plumbing and non impact openings will mean much higher premiums. 

They can help you with acquisition and rehab. for a premium.

Seems like they are running a Pawn Shop, homeowners in Austin/Miami/Tampa etc who need cash bad sell a "HomeShare", percentage of their equity in their home for a discount, with a term of 10 yrs, if the homes go up in value as they have since 2011/2012 then NADA gets the original equity already at a premium price plus any appreciation for the total percentage they bought from the homeowner, but since Austin now down 20% in last 12 months and other hot home markets may also continue to fall, and NADA does not engage in price discovery (ie shopping for best value) as they want to obtain a "Market Value - ETF like" of the cities they invest in.