Thanks @John Weidner and @Luka Milicevic for the replies, and sorry for the delayed acknowledgement on my end. I've decided in line with John and a few others here to address the vast majority of the items in the inspection report. Luka, I appreciate your input though too, and can't really disagree with results- I'm glad to hear your choice has worked out well for you two years in. And I do agree that inspectors are uber-conservative for liability reasons.
For those that might be curious, I've pasted below the scope of work that I'm anticipating to have done. I'm surprised that so many folks on here said the work could likely be done for about $5k. Is that perhaps for work by unlicensed / uninsured subcontractors? I've opted to go the general contractor route for most of the work (except for mold and tree removal) as opposed to managing a bunch of subs myself, and the bids I received have been over $10k (not including the mold remediation and tree removal, which appear to be about $4k and $2k respectively). I budgeted about $18k for the rehab. Of course, it would be great for it to come under that number, but I'm not counting on it. I'm curious to hear if others say that cost estimate is crazy after reviewing the scope of work below.
Note the numbers that follow in parentheses reflect the corresponding problem in the re-inspection report expected to be corrected. The re-inspection report was done after the seller attempted to have some items corrected (but did a miserable job). It can be found at https://dl.dropboxusercontent.com/u/105466347/713bonniebrae.pdf
PLUMBING: Replace PVC piping connections to water heater with copper (37), repair or replace damaged ice maker (45); replace damaged dishwasher hose (48), replace leaking pipes under sink (49); replace sub floor under tub and toilet with accompanying tiling to area floor and address relevant leak(54); replace flexible drainline(64); Install missing bathtub drain stopper (62); add backflow prevention to outside spigot (91)
STRUCTURE: Replace hurricane straps with approved nails (71); reclean ductwork (74); extend gas fired flue (86); Remove standing water; dig vent wells and/or repair basement walling etc to stop water entering crawl space (87); insulate water pipes in crawl space (92)
ROOF & GUTTERS: Replace damaged duct end-cap and cover (10); Add downspout extensions to divert rainwater away from house: Add matching gutter extensions to extend from roof into gutters; Clear moss from roof (20); Add splash blocks and diverter pipes away from structure (14); Replace rain boots and do remedial roof work(13/15); align gutters properly and renail to fascia for correct flow(16); extend downspouts into gutters (18), clean out downspouts and gutters (19); repair leak point (70)
ELEC & HVAC: Install 1 carbon-monoxide detector in hallway near base of stairs (27); Install balance of internal coverplates as well as exterior outlet cover (28,29); Make good loose light fixtures (30) and attach faulty dishwasher bracket (46), replace HVAC filter (77)
INTERIOR: Remove old or molded caulk and silicone to tile in bathrooms (58,59,61,63)and and kitchen back-splash (50). Remove broken or thinning grout to grout lines. Re-apply grout to areas requiring (shower corners and floors, mostly) and then using colored silicone to match, finish off all areas requiring soft joints.
TRIM: Adjust all interior and exterior doors to latch (80, 84); repair all windows for freedom of movement (81); Replace broken window to kitchen (81)
FRAMING: Repair over-notched flooring joists (89)
EXTERIOR: Remove soil from wood contact (4,11)
PAINT: Touch up baseboards after all polly work, walls and doors.
ATTIC / PESTS: trap existing rodent infestation using cages, clean out all contaminants, seal off entry points (68)
GROUNDS: Replace rotted wood (2), Add drip edge and replace piece of damaged wood behind HVAC unit (6); replace rotted corner boards (7); replace damaged siding and paint, as well as siding screws and loose soffit (9)