If I have deduced the intentions of strmchzr correctly, based on other threads he has initiated, there is alot of pond and wetland re-building and engineering in the near future. This would be a good time to get it right the first time and purchase a single unit that will deliver results for all needs. There are laser units that will carry for 2000 ft and they are v easy for one guy to work with. What are the anticipated distances to shoot?
(edit; afterthought): what about test driving a rental?