Daily maintaince prevents immedietly clogging, but still it will build up in head in long run. As this aspect, l1800 will be less usable with same maintaince. So it is really a question of how many prints you need per day and what is your budget.
If you need over 50 prints per day, it is better to go for 8 channel printheads. L1800 is 3 times slower.
If you just want to try this method and don't know where it leads(as hobby) you can start with even a L805. If A3 size is necessary then L1800.