I went to give an estimate today for mowing. When I arrived there is no access to the yard. The front yard is elevated approximately 3ft vertically and is surrounded by a retaining wall. The only way to get a mower in and out would be through a yard two doors down. The homeowner said she can get the 2 neighbors to sign a paper saying I have permission to access her yard through theirs. I want to make sure I protect myself. Any suggestions would be appreciated!