By Chibuike Oguh and Krystal Hu (Reuters) -Elon Musk is in talks with large investment firms and high net-worth individuals about taking on more financing for his $44 billion acquisition of Twitter Inc and tying up less of his wealth in the deal, people familiar with the matter said. Musk is the world’s richest person, with Forbes estimating his net worth at about $245 billion. Yet most of his wealth is tied up in the shares of Tesla Inc, the electric car maker he leads. Last week, Musk disclosed he sold $8.5 billion worth of Tesla stock following his agreement to buy Twitter. The new financin…