I’m waiting for folks to have the unit for a while and share their findings with these details. I’d have no problem only mixing a 2 month supply of reagents based on rewriting only a test every other day rather than daily so long as the opened unmixed reagents don’t expire.The cost of the device isn't awful but the reagents are since their life ticks away once mixed making the "hack" to make a 2 month kit last longer maybe useless. Hopefully though maybe they will last longer mixed or ABC comes out with some cheaper versions.