@ksesst we would also be interested in this long term including sponsoring a bounty for features (right now we are using Current Rental Management system and just importing invoices into ERP Next).
There was some discussion here:
And some related progress made in the property management module:
It would be a big undertaking to add the features, I wonder if it is just us interested or if there are more people who could jointly make a requirements document and sponsor the development.