Since the possibility of disputes is always present your agreement must include a place to cover how any disputes will be handled. This way everyone has already agreed to how these disputes are to be taken care of and cannot argue the point and cause further problems for the rest of the members of the venture. This may end up being the most important area of your agreement and should be filled out very carefully to avoid any possibility of a legal challenge.
All the terms and conditions of the lease should be spelled out very carefully. This lease is very prone to disputes in court. The more specific your terms and conditions are the less chance there will be a problem later. You can find a great number of commercial lease agreement templates, both free and paid, in many websites on the Internet. Make sure that you take a look at several templates before you choose one as it will give you a better idea of how your template should look.