A tenancy agreement template is not universally perfect for everyone. You have the responsibility to make sure that it fits your needs. From the drafting to the alterations, you can seek professional help if you are not sure of what you are doing. There are people who specialize in giving counsel regarding tenancy agreements. Although you can go directly to lawyers, often times they are expensive that consultants. If you can afford their services, then by all means utilize their service. If not, there are hundreds of legal consultants out there. This will prevent you from making mistakes in preparing as well as setting the agreement. Preventing such mistake will also prevent the agreement to be deemed invalid by the legal court's if such case arises.
When you start looking at templates you will find that there are literally dozens of them available, you may need to try several of them out until you find the one that will work best for you and all of the others who are involved in the venture. Your template should include spaces for you to clearly write down the objectives of the venture clearly so that everyone can understand and agree upon them. There should be a place that covers financial contributions and who is responsible for managing them.