The alternative to a chain mortiser is to buy a old reconditioned boring machine.
Or to consider that after you have completed your project you sell any or all of these tools, to recover your investment.
I know that some people buy a chain mortiser for $1300 and then cut their one and only frame, and then sell their chain mortiser for $1000 or so. And consider the $300 they lost as "rent" for the machine for the one or two years they work on their project.
Just somethings to consider...
