Paraplegic toilet for wheelchair Tennis players

Ww have wheelchair bound children who receive Tennis lessons weekly for the past 2 years. We have decided to start wheelchair tennis as these kids where not doing any sport activities at school etc and we have seen how therapic it is and they have grown in confidence. We have 2 of the number 1 ranked players in our region. Unfortunately our facilities do not have wheelchair friendly toilets and we struggle to play for long hours and we can't even hosts tournaments as we have to hire a toilet and its costly. Kindly please help us purchase a mobile paraplegic toilet that will enable us to practice long hours and hosts tournaments. Your help will be kindly apreciated.