Following on from Brian:
An emonPi will monitor (say) your two main incoming cables and run emonCMS, giving you the graphs and records. Fig 2 or Fig.3a on the N.America page is the arrangement for the main incomers.
Then for each 240 V circuit, you need only one c.t. on one leg - assuming you’re prepared to accept a minor inaccuracy because the control circuit will be run off 120 V so will take a very small current from one leg only. Fig.4c on that N.America page is the arrangement, and it doesn’t matter which leg you put the c.t. on.
Therefore, to monitor 5 separate circuits plus 2 for the whole house (which will catch everything else as well), your most economical solution is 2 × emonTx plus an emonBase (that’s an emonPi without the energy monitoring part, but still with a radio to receive the data from the two emonTx’s).
Yes, you can have each c.t. logged separately, and you can do maths before you log the data - so one graph could be the combined house power on both legs, for example. Another could be the imbalance between the legs - though I’m not sure whether that would be helpful . You’ll need to do some maths anyway for the 240 V circuits - to double the power you measure - because you’re only picking up half the voltage.