adapting my house

From experience with disability campaigning groups, it can be fine in theory, but not quite straightforward in practice,  to deal with DFG systems.   People report extraordinary  delay, unreasonable operation of the system, insistence on rigid notions regardless of actual individualised situations, and other problems.   Go for it by all means, as plan A.  But do a little research and be prepared if at all possible to have a plan B up your sleeve. You may strike lucky, but maybe an ounce of information avoids  a pound of frustration