I'm having trouble getting an objective recommendation for resolving the leaky basement. The leaking appears to be due to seepage which is not covered by insurance.

We recently bought a 1940 house in Edmonton with drywall in the basement, no flooring or ceiling finish, just drywall. The basement houses only the furnace, hot water tank, and laundry. Tenants reported two leaks on opposite sides of the house when it rains. On one side of the house, there is a brick garden box outside of the house, the other side of the house is under the deck. Therefore, simply piling on the dirt outside is not an option, more work involved to dig out the garden box or move part of the deck to do exterior work. 

Some of the basement companies wouldn't come out to the house because of the drywall since they won't be able to see the foundation wall. We cut out a couple of feet of the drywall on both sides and saw hairline cracks and water stains on the wall, and also looks like cracks had previously been addressed with filler or some kind of paste. A little bit of mold was present so we didn't continue removing drywall, but the mold was only thin layers in small sparse patches as it appears the drywall was more recently installed, perhaps a few years ago. 

Today a general contractor told me he would remove all of the drywall for under $300. However a restoration company told me that due to the mold it would cost $2000 to remove the drywall. However, I have asked whether it is advisable to move the tenants out and everyone has told me there isn't enough mold to justify moving them out. 

One basement company says they would recommend escavating a U-shape around the house and installing weeping tile and a sump pump for $20,000 - $30,000 since the leaky spots are in two places on opposite sides of the house. Another basement company recommends weeping tile around the perimeter on the inside with a sump pump for $12,000. Other contractors recommend epoxy fillers or other injectables only because that's what they always use before finishing a basement.

I've been spending a lot of time calling people and trying to figure out the best thing to do. Can anyone offer advice?