A Polish bus has been rebuilt as a mobile hospital where medics can immediately do complex operations.
Next, a former food truck is being converted into a medics' sleep and wash area.
And a towable boat will be able to evacuate the wounded by water.
Hossu, a former political consultant, has named the project after Oleg Gubal, a Ukrainian soldier who died en route to hospital.
He knew Gubal personally and wants to stop other families experiencing such grief.
"If something like this would have existed... I'm not saying Oleg would be alive, but it would have been a chance for him to survive," Hossu said.
