I use the F1 Chrono. Has and does work really well. In fact, I am taking is out at lunch today to do some tests! I don't mind having to read it from a distance (of 10 feet), nor getting out of my chair to reset it as I have to go out and change targets anyway after a string. Got mine for $99, but see Walmart has 'em on line for $70. http://www.walmart.com/ip/F1-Chronograph/4382668
. BTW, I tested mine with another manufactures unit behind mine and they were within 20fps. Good enough for me.
The tape idea is a good one. First thing I did. Longest time is getting tripod legs where they need to be when setting up for use, so from rest your setup to shoot between the tape and then straight with the target