I dont understand, from a credit perspective, what you hope to gain by securing a new line of credit, and then instantly maxing it out will a BT.
Each new card you seek is a new inq, and thus hurting your FICO. Even if secured, it may increase your CL with the new card, but if used for BT, will instantly be at very high %util. Most BTs will cost you an instant 3% of the BT, and thus also instantly increase your debt.
I know that you view a new CL as a way to increase access to cash, but it comes with a serious price. IMHO, your plan will just dig your hole deeper.