If you can have a professional install a strap button for you, that would give you the most support. Usually, it works well to install one at the bottom of the uke, and then tie the other end to the headstock. You can install a button at the heel of the neck, but if the uke is neck-heavy, it will not keep the neck in position while you're playing, and it will be frustrating (believe me I know!). I have 3 different ukes with strap buttons installed. Since I developed the Uke Leash, I decided not to have strap buttons installed anymore. It is just my choice, since I think they look better without it. Unless the ukulele designer has incorporated a strap button into their design, I hate to alter the high end ukes. I am always hyper-nervous that some "accident" will occur during installation, since each time I go into the music store, there is someone different at the workbench. I have no idea how experienced that person is, and so I fear the worst. I am pretty handy with a drill, and have done a fair amount of model building, but I would be way too nervous to do it myself without a proper workbench vice or a drill press set up.
Anyway, Uke Leash is an option for some people. There is a new leather strap button adapter if you want to use it as a full strap. If you have any questions, just email me ukeleash@me.com
–Lori