Note from the subject book::

Śrīla Prabhupāda-līlāmṛta:
«And he did not have to flatter anyone, support anyone, or manage anyone's life. His mind and intelligence were free and dwelt constantly on his service to his spiritual master. He saw his present circumstances as a preparation for a greater task before him. Despite his advanced age, he felt that he had barely begun his work. Yet he felt confident. He had his vision of a world association of devotees. It was not an idle dream, although he was not certain how it would all come about. But he knew his duty. For the present he would go on describing his vision, the vision of his predecessor spiritual masters, in articles and books. But as soon as possible he should go to the West. Westerners, he had concluded, were not satisfied with a materially comfortable life devoid of spiritual understanding; more than his fellow Indians, they would be open to the message of the Absolute Truth. He knew he should go. And he would go-if Kṛṣṇa desired.

Abhay lived frugally in Vṛndāvana, keeping exact account of every expenditure and every receipt. He carefully kept a ledger, just as if he were running a substantial business, even though his purchases were only a little milk, a few vegetables, charcoal for cooking, bus rides, and his major expenditure, postage.
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Abhay composed a Bengali poem, "Vṛndāvana-bhajana." Its opening stanzas were especially self-reflective and personal.

I am sitting alone in Vṛndāvana-dhāma.
In this mood I am getting many realizations.
I have my wife, sons, daughters, grandsons, everything,
But I have no money, so they are a fruitless glory.
Kṛṣṇa has shown me the naked form of material nature;
By His strength it has all become tasteless to me today.
Yasyāham anugṛhṇāmi hariṣye tad-dhanaṁ śanaiḥ:
"I gradually take away all the wealth of those upon whom I am merciful." 
How was I able to understand this mercy of the all-merciful?»

Śrīla Prabhupāda is here in the ADVANCED AGE of 61– his supporters, friends and family left him broke.

Śrīla Prabhupāda-līlāmṛta another reference:

«Prabhupāda's most ambitious literary undertaking, the completion of Śrīmad-Bhāgavatam, was to be no less than sixty volumes. He had begun in India in 1959, and all along he had been aware that he was attempting a gigantic task at an advanced age. Now Kṛṣṇa was giving him opportunities both for writing Vedic literatures and for travelling, and he was working at an amazing pace.»

Prabhupāda is here in ADVANCED AGE of 63 starting to write his Bhaktivedanta Purports – I guess in India it was an advanced age, but not in Florida.