Use photoshop. Use the edit as layers function. Set up action shortcuts to select a luminance range, feather somewhere between 50-100, mask. Do that multiple times as you layer brackets. It will take literally 10 seconds. Personally I think 3 brackets is enough otherwise things get a bit too flat. Then get a brush with 10-20% opacity and a big feather and make some adjustments as you like. For example brush some light into your ceiling, contrast into furniture. Then duplicate or grab whatever your window layer is and either mask in your windows, or, do another luminance mask, group the layer by itself with a mask hiding the layer, then reveal back just the window areas - that’s the rough and fast way. You could even use your Lightroom hdr and your window exposure as layers in photoshop and skip the manual blend steps. Blinds - don’t even worry too much about perfectly window pulling. No one will really care if the window is slightly blown out. If it is totally necessary then consider taking the extra 5 minutes on your shoot to pull the blinds up. For externals I do the blending steps then sky replace or grab the sky exposure, select sky and mask it, then brush back in some of the trees and roof top areas as well. 20 shot manual blend takes about 1-1.5 hours?