Hi there and thank you for your questions. The minimum for the main sale is $5,000 / no max.   
The BlockEstate Alpha Fund Private Seed Round started on the 17th for select qualified participants. For an invitation please signup at https://blockestate.com/sto/, the min for the private sale right now is $25,000.

There will be a public offering as well.
Visit the website https://blockestate.com for more offering details. Thank you.