For some cheap ones that won't do all the things you're asking for you can check united hobbies... I know they have a couple data recorders for cheap

Use your watt meter to determine watts. If you're under 5 pounds of thrust any postal scale from your local office supply store will work. Create a 90 degree jig to hook the motor to with a pivot point. Equal length distance between the motor and the scale. Most people just do a rough calculation for speed based on rpm and which propeller they are using. Not quite accurate but good enough to get a relative idea.