There also really interesting things like mechanics liens which are sometimes wiped out, and sometimes not depending on the type of work.5.

As long as the home is clean and mechanically sound I would take a maintenance stance on the older items and replace only when cost effective/totally necessary. 

Items I look for are, does the flooring need to be replaced, do all appliances work, its is clean enough for the next group to move in or does it need extensive cleaning, what condition is the yard in, anything mechanically wrong (do the toilets flush, windows open, garage door work, locks and keys all work and so forth).You can bring a handy many with you if you have one that's cheap, if you are really concerned you can always hire a home inspector, but that's going to cost you 400-500$, and probably overkill.

Maybe it's good no one did, sounds like you weren't ready.Your ad is too much, judgemental statements like "this home is not a mechanics shop" need to go.

Very efficient.Chances are the older system has substantial duct loss and should be tested.Mini splits have their place but cold air is heavier and drops so the bottom floor doesn't make sense.Electric motors do not raise in load consumption as they age, it's the mechanical work done that raises load, typically deferred maintenance on belts, shives and pulleys.I'd disqualify HVAC companies by asking; Are you proficient in the new Manual J,S & D standards (that will be required in the industry moving forward)These companies will understand laminar flow, stratification and static airflow imbalances that have a great effect on efficiency, operation and longevity of a conditioning system.Get 3 estimates, compare scope & make sure its permitted.

@Jonathan R McLaughlin: i definitely agree on the importance of a strong lease but we tend to use more of a legal language in the leases and I think that a "rule book" or "handbook" that uses more of a plain English would help tenants to understand some of mechanics of a house and how it may potentially affect them - you are right, they should care more if they see how it may affect their quality of life. 

I am a dedicated and passionate mechanical engineer.

An SD IRA is a good mechanism, but it really an antiquated system that Equity Trust uses.

Your IRA LLC operating agreement and/or your loan agreements will be scrutinized for authorization or intent of prohibited transactions and the IRA reporting mechanisms/paths will followed.

Well wouldn't this be as ethical as using irrevocable trusts and other legal mechanisms to keep people from pursuing legal action?