Eko had a EquityNet page (fund me) their fund goal was $150,000, they only raised $27,000.
Max4 does offer coach warranty service through second parties.
"Our service program is one of the best in the business. We don’t limit you to an RV dealer network, so you can take your Max4 to any of our 140 authorized motor home repair facilities nationwide and have the technician call us for troubleshooting assistance. For issues covered by our conversion warranty, we pay for any repairs directly to the authorized service center right then and there, so you can get the service done and be on your way."
As for the 4 (AWD) wheel drive issue, it looks like their info is from Europe, probably just copied with out fact checking for their questionable web site.