As a surveyor, I say..."times are tight, hire a surveyor", as a former tech controller, I say you need someone familiar with this type of surveying and most surveyors would not do this properly without some research that they may want to charge you for. You can learn to do it from a good tech controller, but you need good angle turning equipment, thats capable of angles down to 20 seconds and the knowledge of how to use it. Based on the ones I've done (about 30). It takes about 2 hours for the angles and about an hour to calculate on a course I've done before with an ideal setup. Setting one up could add an hour or 2. This is using the AWSA program for a 3 point setup (which works very well as long as your course is fairly close). The single point program works well too, but you need a swimmer...and it's a long job for a swimmer.