Bridge Loan, HELOC, loan on hard assets?

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In process of looking for a new primary residence and may make an offer within the new few weeks. Current home is paid off and looking into houses that are about 150-175K over approx sale amount of existing home. What is the best way finance the new house before selling the old. Expect (hopefully) to sell within two months but it could be longer but I want to minimize my out of pocket expenses - interest and fees during this transition.

Also have assets equalling the purchase price of the new house in either IRA's, brokerage accounts, currency and credit is excellent. Looked into HELOC's but with the assets I have could I temp finance another way. ?