If property is occupied they can stay 90 days since you give them 90 days notice, before you can start eviction process ( in DuPage county takes usually 6 to 8 weeks ) You can try pay them to leave but usually doesn't work since they know how long they can stay for free.

ADUs can take over a year to complete and virtually always take over 6 months to complete.  

Take inventory of similar projects in close proximity.

I'd like to keep $100k equity for myself and sell the other $500k to equity investor(s) so I can keep the excellent mortgage (fixed at 3.25%) and take advantage of the cash flow and build more equity.

Wholesaling is a competitive business in most markets and takes time and resources.

Get the people who are potentially making the decision to give you more details and specifically what it would take to get it done.

I self financed it until I had to take on some loans due to delays and cost overruns (ever heard of such a thing???).

. +30% vacancy for 24 months, caused by two evictions, one unit on market for 7 months, and the two new properties taking 1 year in renovations instead of 4 month estimate (~$30k of lost income above assumption of 10%)2. $45k from several unexpected large repairs (water leaks, roof collapse, siding rot, plumbing main line, etc.)These issues are also causing me to rethink the assumptions in my model, increasing my vacancy rate from 8% to 12%, repairs from 5% to 20%, and capex from 5% to 20%.

If the rent is at or above market maybe it takes longer.

Let someone else take the chance......