But I’m going to get back full tilt this summer.  

I won't be investing in the riskiest/most supportable asset subclasses such as hotels, and tilt my portfolio the ones that have historically been more stable such as multifamily and single-family housing.

Tilt in for easy cleaning.

Typically you are not deciding to use glass for thermal performance but for other reason like aesthetics. https://www.lowes.com/pd/SEVES-Glass-Block-Glass-Block-Common-8-in-H-x-8-in-W-x-4-in-D-Actual-7-75-in-H-x-7-75-in-W-x-3-875-in-D/1000095299This window is R-0 but I think the info is not provided here. https://www.lowes.com/pd/Project-Source-30001-Series-Tilting-Vinyl-Double-Pane-Double-Strength-Replacement-Basement-Hopper-Window-Rough-Opening-32-25-in-x-14-25-in-Actual-31-75-in-x-13-75-in/3683856This window is R-3.33   (U-value is reciprocal of the R-value)  1/0.3 = 3.33https://www.lowes.com/pd/ThermaStar-by-Pella-Vinyl-Double-Pane-Annealed-Replacement-Double-Hung-Window-Rough-Opening-27-75-in-x-45-75-in-Actual-27-5-in-x-45-5-in/3119077

Two years later a dormant spring (pay attention to street names) popped up and moved one of the three houses a full 3 inch tilt!