Gantt Resource View without start and end dates

Hi,

I'm trying to plot task on Gantt without any start or end date. It just have number of days each month. Our data just consists of number of days a resource will work on a project each month. A resource will be allocated to multiple projects in a month. Something like below

I would like to show each resource's availability during each month, for planning purposes, like below using the above data

Whats the best way to achieve this? we are looking into unscheduled tasks, but from the online demo it seems like it will plot the below each other not next to each other.

Any suggestions are highly appreciated.

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Thanks

Amit