With your disability, one benefit you may have if you 'add on' (as
opposed to building a new house) is that there may be Federal And/or
State tax breaks and/or grants or low-interest loans available for
safety and/or accessibility as it relates providing for both your
current and future limitations.
With this in mind, I suggest that you contact
the Illinois Assistive Technology Program
for advice and assistance on building new and remodeling/add-on
technical accessibility assistance as well as the financial aspects
Let me know if you need more input. If not, thanks for the
opportunity to assist you... I would really appreciate your honoring my
efforts by 'pushing the button' and Accepting this answer. Adding
a bonus -- should you wish to do so -- is always warmly welcomed.