And, there are ways to supplement light, build greenhouses and provide heat for the colder months, but this all cost money.

Generic questions tend to get generic answers. 

I was planning on composing a detailed step by step instruction and supplement it with a video demonstration.  

The businesses will supplement my federal pension, but I would like to be able to use them to grow each other as well.

Never would of guessed there would be so much discussion.Sure I spent the last couple days reading through them and most responses were pretty generic.  

If you are looking for something generic, check out investor carrot.  

Alienate them and you may have a problem on your hands.The generic "Do you have income and how much" type of question is a safer approach.It's so easy these days to put yourself in the cross hairs of a discrimination suit without even realizing you did anything "wrong". 

They may continue with a generic Wall St 401k in the business (or not) and rollover the Solo 401k and any non-traditional assets to an IRA at that point.A point to keep in mind is that if you have multiple businesses, they are looked at as one by the IRS and Department of Labor when considering retirement plan benefits.  

There is zero logic in you wanting to supplement their home purchase expenses out of your own pocket.

My medium term goal is to achieve supplemental passive income.