To the effect that failure to pay is considered a default, and that in the event of default you are permitted to get a judgment and attach a lien to their property.

(I'm sure your standard lease says that running a business from the house is not permitted, correct?)

I do understand that seller carry back loans are no longer permitted, but what about a 25-30% ownership in the LLC that I use to purchase the building?

Real Estate State commission laws vary by state.We don't need to be doing blanket statements on here.Some states DUAL AGENCY is against the law and is not permitted period.In my state of Georgia it is allowed.If you are practicing dual agency and it is legal in your state you have a fiduciary duty to BOTH of your clients NOT just the seller.You can still in many states get paid both sides of the commission not practicing dual agency.Simply in your contract state that you represent the seller and NOT the buyer.You can perform what most states call ministerial acts for the unrepresented party.These ministerial acts will be defined by your real estate commission in writing.If you deviate from providing what is written you can create "implied agency" without even knowing it.So you can usually fill in a purchase price or other items in a contract for a buyer.If they ask things like why is the seller selling or how motivated are they etc. you can't share those items unless you have permission in writing from the seller.

But I have heard of some investors making a good profit with these by either finding them in areas just outside the wave of new development (a low-rise apartment building occupying a large parcel of land may be very valuable to an SFR developer) or in a city which is down-zoning (not issuing permits for new multi-family buildings making yours much more valuable).

This type of easement does not arise if the owner of the servient estate posts a conspicuous notice on the real estate stating that the use of it is permitted and subject to his/her control.

I personally don't like windows in tub area when that tub also has a shower, due to issues I have seen with rotting of the window sill from the shower water standing on the sill area.Tempered glass should be permitted, since this is what a glass shower door would have.I have to wonder about the reasoning that the building inspector is using here: Why isn't that window allowed?

You'll also want to find out what permits are needed, who can pull them and what inspections have to be done in what order.I would very much have a plan of attack.

Yes, there usually is a permit fee attached.

We have been the only tenants.Landlord took two (2) months security deposit when state law permits only 1 1/2 months.